71–80 of 87 posts
Earlier quoted context omitted.
Well that'd be 1.2 kWh, stored for a penny. Average electricity price in the U.S. is 10 cents/kWh. I've often criticized people for ignoring the cost of storage when talking about wind/solar prices, but at a penny per kWh it's pretty insignificant.
But that’s for storage, not production.
Earlier quoted context omitted.
Well that'd be 1.2 kWh, stored for a penny. Average electricity price in the U.S. is 10 cents/kWh. I've often criticized people for ignoring the cost of storage when talking about wind/solar prices, but at a penny per kWh it's pretty insignificant.
Judging by the quote that's the amortized price. That first kWh is going to be much more expensive.
Earlier quoted context omitted.
> Makes me wonder why they didn't think of this before Because a brute-force search is something only an IT professional can come up with.
“I have not failed. I've just found 10,000 ways that won't work.” ― Thomas A. Edison
Even though this uses Hydrogen, which means small quantity of water, water still a finite resource, it becomes costly every year, specially the one that's drinkable. This seems like a double sword, solving one side, while it makes other worse.
This product is, of course, more expensive but at least it's already being deployed.
Earlier quoted context omitted.
“I have not failed. I've just found 10,000 ways that won't work.” ― Thomas A. Edison
Edison didn't even invent the lightbulb, which is what that quote is referencing.
The most lasting contribution Edison made to the light bulb was the screw-in base, with one contact at the bottom and the other in the shell. But even then, there were a lot of alternative designs, as Edison was a real ass when it came to licensing.
But he didn't brute-force far enough to develop the tungsten filament, did he?
Could someone ELI5 how the recharge cycle works? On charging it evolves H2 gas; how does that get put back on recharge? This is very much NOT explained by the paragraph, > The researchers did this by re-attaching their power source to the depleted prototype, this time with the goal of inducing the manganese dioxide particles clinging to the electrode to combine with water, replenishing the manganese sulfate salt. Onc…
In the modern sense of the word, this is not a battery. It is a device that cracks water into hydrogen, which can then be fed into a fuel cell. Presumably, it consumes distilled water, which is why it is targeting utility scale storage and not home installations. The work sounds interesting, but the article is painfully written. Lead acid batteries produce hydrogen too. I think the insight is that this can’t produce…
The paper, linked below (thanks xelxebar) would beg to differ, it says
> we report a rechargeable manganese–hydrogen battery, where the cathode is cycled between soluble Mn2+ and solid MnO2 with a two-electron reaction, and the anode is cycled between H2 gas and H2O through well-known catalytic reactions of hydrogen evolution and oxidation.
They give an equation for the cell operation as,
Mn2+ + 2H2O ↔ MnO2 + 2H+ + H2
Mn2^+^ + 2H_2_O ↔ MnO_2_ + 2H^+^ + H_2_
> During discharge of the battery, the uniform layer of as-deposited MnO2 on the cathode is dissolved back to soluble Mn2+ electrolyte and H2 is oxidized on the anode.
So, I guess it stays in solution...?